[Elecraft] Elecraft Digest, Vol 196, Issue 17

[Jim Brown]

On 8/17/2020 4:04 AM, Tom Doligalski via Elecraft wrote:
> I’ve had a similar experience: lightning came in via the cable line, 

Lightning also induces current on wiring inside our homes.

took out the cable modem, the router, the PC, and the serial interface 
on the K3.

  This is a VERY common problem. It is caused by failure to do proper 
bonding, and by the use of SHUNT-mode surge protectors like MOVs. 
SERIES-mode protectors, like those made by Brick Wall and Surge-X do NOT 
cause these failures. They're not cheap, but neither is the equipment 
they're protecting. Pin One Problems are another cause, and every ham 
rig I've ever inspected has them, including the K3.

Study Ward Silver's excellent ARRL book on the topic, and/or 
http://k9yc.com/GroundingAndAudio.pdf  and get VERY serious about 
bonding both in your shack and throughout your home.

> At this point the replacement PC communicates with the internet using WiFi.

That's a very good replacement for wired Ethernet, and eliminates one 
part of the problem. I've used it for about 16 years, starting in a 
Chicago residential neighborhood and continuing when I moved to the 
Santa Cruz Mtns in 2006.

73, Jim K9YC